RRB NTPC Prelims Model Paper 4 with solutions

Question : 31 of 100

Marks: +1, -0

If 30 men can complete a job working 8 hours a day in 12 days, then working for how many hours a day can 24 men complete the same work in 10 days?

Solution:

(4) Let required number of hours be h.
Then, 30 × 8 × 12 = 24 × 10 × h

⇒h={30× 8×12}/{24×10} =12 hours

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